US Bridges

Canyon RD over SR 512

Good

Pierce County, Washington · 3.6 E JCT SR 7 · Structure no. 0008437D0000000

Built
1969
56 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
248 ft
4 main spans
Daily traffic
36,933
2016 count
Owner
State
State Highway Agency

About this bridge

Canyon RD over SR 512 is a prestressed concrete continuous stringer/multi-beam or girder carrying Canyon RD over SR 512 in Pierce County, Washington. It was built in 1969, so it is 56 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 36,933 vehicles a day, roughly 8% of them trucks, projected to reach 60,127 by 2038. The structure is 248 ft (75.6 m) long and 89 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCanyon RD
CrossesSR 512
Location3.6 E JCT SR 7
RouteCounty Highway 0
Coordinates47.15775, -122.35709
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length248 ft (75.6 m)
Longest span76 ft (23.2 m)
Deck width89 ft (27.1 m)
Roadway width77 ft (23.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,933 (2016)
Projected traffic60,127 by 2038
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$9.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Canyon RD over SR 512 built?

It was built in 1969, making it 56 years old in 2025.

What condition is Canyon RD over SR 512 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does Canyon RD over SR 512 carry?

About 36,933 vehicles per day (2016 count), of which roughly 8% are trucks.

How long is Canyon RD over SR 512?

The structure is 248 ft (75.6 m) long with a longest span of 76 ft (23.2 m) and a deck 89 ft wide.

Who owns Canyon RD over SR 512?

It is owned by the State Highway Agency.